Improvement in illuminating ventilating-stepj



, 2S heets--Sheeti. T. H!.-ATT. Illuminating Ventilating Steps.

Patented Dec. 2, i873.

Na. 145,209. V

U ITNEE BEE:

2 S hee-ts SheetZ.

TJHY-ATT. Illuminating Ventilating Steps.

Patented Dec. 2,1873

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iT NE 5 5E UNITED STATES PATENT OFFICE.

THADDEUS HYATT, OF NEV YORK, N. Y., ASSIGNOR TO ELIZABETH A. L. HYATT, OF SAME PLACE.

IMPROVEMENT IN lLLUMiNATiNG VENTILATING-STEPS.

Specification forming part of Letters Patent No. 145,209, dated December 2, 1873; application filed October 2.2, 1873.

Cnsn 30.

To all whom it may concern:

Be it known that I, THADnEUs I-IYATT, of New York, in the county of New York and in the State of New York, have invented certain new and useful Improvements in Illuminating Ventilating-Stoops; and do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, making a part of this specitication, in which Figure l is a perspective view of the upper side of my illuminating and ventilating-stoop. Fig. 2 is a vertical section of the same upon a line having a right angle to the front of the building, showing the ventilators closed; and Fig. 3 is a like view of the same, 'showingsaid ventilators open.

Letters of like name and kind refer to like parts in each of the figures.

The design of my invention is to enable the thorough ventilation of basements and extensions of the same beneath the sidewalk, and at the same time permit light to pass freely into the same; to which end it consists, principally, in extending an illuminating plate, which forms one level or step of a stoop, beneath and in rear of the front edge of the plate forming the next highest step, so as to form a ventilating-chamber, substantially as is hereinafter specified. It consists, further, in partially or wholly inclosing the rear side of said ventilating-chamber by means of a glazed wall or partition, substantially as and for the pur pose hereinafter shown. It consists, finally,

in the especial construction and arrangement of the parts which form the ventilating-trap, substantially as and for the purpose hereinafter set forth.

In the annexed drawings, A and A represent two illuminating glazed plates, which formthe stoop of a building-front, and are arranged upon ditferent levels, so as to constitute steps. The sill A of the door is also constructed of or from an illuininatingplate of metal, and placed at a higher level than the second plate A, and between said plates and between the latter and the lower plate A are side of the plate placed metal risers B, that are constructed sufficiently open to permit air to pass freely through the same. The rear side of each plate A and A extends beneath the forward edge of the next higher plate, is glazed so as to permit light falling upon its upper surface to pass freely downward into the space 0 beneath, and has its rear edge (t extended upward for a short distance, so as to prevent water from passing from the front into said space, such arrangement forming a ventilating-chamber, l). \Vithin the angle formed by the upper A and the upward-extended edge a of its rear edge is hinged one edge of a glazed frame, E, which has such size and shape as to cause it to fill, vertically and longitudinally, the space between said plate, the plate A, and the end plates F, when raised to a vertical position, as shown in Fig. 2, and thus prevent the circulation of air to or from the space 0 through the chamber D; but when said plate is turned forward and downward, as shown in Fig. 3, but little if any obstruction is offered to the free passage of air.

By so arranging the hinged plates as to prevent them from dropping below a line extending from their hinged edges upward and outward to the forward edge of the plate A or A next above, it will be seen that they effectually prevent the inward passage of rain during astorm, while at the same time they permit air to circulate with sufficient freedom to supply all. the requirements of ventilation for the space 0.

The hinged plates may be moved in any desired manner, but I prefer to have them overbalanced upon their outer sides, so as to incline outward by their own weight, and to govern such inclination and raise them, when required, by means of a cord, Gr, attached to the upper edge of each, over a suitable pulley.

If desired the plates E may be rigidly fixed in position, but I find it more convenient to have them arranged as shown, so as to permit the inward passage of air to be prevented during very cold weather.

Dirt lodging within the ventilating-chambers may be easily removed by means of a and passing inward stream of water'frcm a hose Without in any manner endangering the safety of articles contained within the space beneath the stoop.

Having thus fully set forth the nature and merits of my invention, what I claim as new 1s 1. In an illuminating-stoop, arentilatingchamber formed by extending the rear ed ge of one plate beneath, and in rear of the plate which forms the next highest step,snbstant-ially as and for the purpose specified.

In an illuniinating-stoop a Ventilatingchamber formed between the rear edge of one plate and the overlapping; front edge of a higher plate, and partly or Wholly inclosed at its rear side by means of a glazed wall or partition, substantially as and for the purpose shown.

3. The overlapping illuminating-plates A and A, open risers B, and glazed frame 15, when constructed and combined in the manner and for the purpose substantially as set forth.

In testimony that I claim the foregoing I have hereunto set my hand this 26th day of July 187?.

THADDEUS IIYAIT.

\Vitnesses:

Annnesn l\lONEl',L, UnARLns SPYR. 

